The original lineup was Doctor Octopus (who invited them in this order) , Vulture, Electro, Kraven the Hunter, Lizard, and Hydro-Man.
No. There were plans for a Sinister Six movie but when The Amazing Spider-Man franchise was cancelled after the second film, the Sinister Six movie was cancelled as well.
The Sinister Six will have their own spin-off.
Yes
Websites have announced that a spin-off for the Sinister Six is currently being planned for future release. It will be set in the same universe as "The Amazing Spider-Man".
Yes
There's speculation the Tom Holland Spider-Man era might introduce Sinister Six but nothing has been confirmed.
Yes
it looked like it although sony was planning on making a sequel to spiderman 3 with the sinister six with original sam raimi crew it was unknown if he would appearred to have lived and become leader of the six because the movie was cancelled
Ultimate Spider-Man - 2012 Sinister Six 2-6 was released on: USA: 17 February 2013 (Release of official version)
No one is the Sinister Six in The Amazing Spider-Man 3 because TAS-M3 does not nor will it ever exist. The Amazing Spider-Man film franchise ended after two movies.
Ultimate Spider-Man - 2012 Return of the Sinister Six 2-25 was released on: USA: 3 November 2013 (video premiere)
The original lineup of the Pussycat Dolls featured six members: Nicole Scherzinger, Ashley Roberts, Melody Thornton, Jessica Sutta, Carmit Bachar, and Kaya Jones. The group was formed in 2003, with Scherzinger often being the most prominent member. Over time, there were some changes in the lineup, but these six were the initial members that contributed to their early success.